Tire with asymmetrical and reinforced sidewalls
a technology of sidewalls and asymmetrical tires, which is applied in the direction of tyre beads, non-skid devices, transportation and packaging, etc., can solve the problems of tire behavior perturbation and difficulty for drivers to control, and achieve the effect of reducing weigh
Inactive Publication Date: 2005-04-26
MICHELIN RECH & TECH SA
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- Abstract
- Description
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- Application Information
AI Technical Summary
Benefits of technology
"The invention is a tire with a reinforced carcass and a reinforced sidewall. The carcass reinforcement is made up of parallel reinforcement elements that form an angle with the rotation axis of the tire. The angle of the reinforcement elements in the sidewalls is different to create a mechanical coupling between the additional sidewall ring and the bead. The additional sidewall ring can be made of a single material or a composite material, and it can be hollow to reduce weight. The mechanical coupling between the additional sidewall ring and the bead is formed through a coupling section that extends the additional ring radially inwards. The invention provides improved tire performance and stability."
Problems solved by technology
Bearing in mind the contact forces between the tire and said road, this leads to rolling behavior that can produce threshold phenomena which are difficult for a driver to control, especially at high speed.
This new distribution of contact pressures perturbs the behavior of the tire during cornering.
Method used
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Embodiment Construction
[0036]FIG. 1 shows a tire 1 according to the invention, mounted and inflated on its utilization rim 2 and intended for fitting to a passenger car. Viewed in meridian section, the tire comprises a crown 9 connected to the beads 3 and 3′ of said tire 1 by two sidewalls 4 and 4′, a first sidewall 4 called the outside sidewall and a second sidewall 4′ called the inside sidewall. The beads 3 and 3′ of the tire 1 comprise, radially on the inside, portions inclined at an angle which is open axially and radially outwards; these inclined portions are designed to be in contact with seats 21, 21′ of the rim 2 which are also inclined by an angle γ, the same in both cases, which is open axially and radially outwards. When the tire has been mounted on its service rim, a mechanical compression effect is obtained between the rim seats and the tire beads mainly because of the pressurization of said tire. In addition, and as is known, the rim seats comprise a flange 22, 22′ to restrict the axial disp...
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A tire comprising two beads, a crown and sidewalls that connect the crown to said beads, the tire being reinforced by a carcass reinforcement anchored in each bead to at least one annular anchoring element, each sidewall comprising an additional, inextensible sidewall ring located axially inside the axially outermost carcass ply and a coupling section located radially between the annular anchoring element in the bead and said sidewall ring and positioned axially inside the axially outermost carcass ply. The tire is characterized in that the line segments passing through the centers of gravity of the sections of the annular anchoring rings in the beads and through the center of gravity of the sidewall rings on the same respective side, make angles respectively of β1 and β2 relative to the rotation axis, these angles being different.
Description
[0001]This application is a continuation of PCT / EP02 / 07953 filed on Jul. 17, 2002, the entire content of which is hereby incorporated by reference.FIELD OF THE INVENTION[0002]The invention concerns a tire with a semi-radial or radial carcass, which can be fitted in particular but not exclusively to vehicles that can roll at high speed.BACKGROUND OF INVENTION[0003]When a vehicle fitted with tires with a semi-radial or radial carcass drives round a bend, modifications of the rolling conditions occur and, in particular, the footprint (i.e. the contact surface between the tread of each tire and the road on which the vehicle is rolling) can be very considerably modified in the shape of its contour and in its area. Bearing in mind the contact forces between the tire and said road, this leads to rolling behavior that can produce threshold phenomena which are difficult for a driver to control, especially at high speed.[0004]In the configuration adopted when rounding a bend (cornering), the ...
Claims
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IPC IPC(8): B60C3/06B60C3/00B60C3/04B60C15/02B60C19/00B60C15/00B60C13/00B60C9/08
CPCB60C3/04B60C3/06B60C11/0332B60C13/00B60C15/0018B60C15/0236B60C19/001B60C13/009B60C15/0081Y10T152/1018Y10T152/10864Y10T152/10837
Inventor MUHLHOFF, OLIVER
Owner MICHELIN RECH & TECH SA